%% dx = (0.125,0.125)
solution = [
0 1.7265e-16 1.51589e-15 -8.64258e-16 2.80837e-15 -2.16001e-15 -3.01691e-15 -1.45024e-14 0 
1 0.368169 -0.936403 -1.22068 3.83658e-16 1.22068 0.936403 -0.368169 -1 
-5.77316e-15 -0.066286 -0.166985 0 0 0 0.166985 0.066286 -1.22465e-16 
-1 -0.466328 0.719208 0 0 0 -0.719208 0.466328 1 
4.996e-16 -0.0428707 -0.0850588 0 0 0 0.0850588 0.0428707 2.44929e-16 
1 0.379904 -0.900233 -1.14908 -3.05018e-15 1.14908 0.900233 -0.379904 -1 
2.22045e-15 -0.0126429 -0.0205829 -0.0178906 -3.61508e-15 0.0178906 0.0205829 0.0126429 -3.67394e-16 
-1 -0.409893 0.848435 1.0981 -3.78517e-15 -1.0981 -0.848435 0.409893 1 
-4.89859e-16 -1.87461e-16 7.99361e-15 -4.21211e-14 2.16885e-15 1.31657e-15 2.78109e-15 1.87461e-16 4.89859e-16 
];
exact = [
0 0 -0 -0 -0 0 0 -0 -0 
1 0.382683 -0.707107 -0.92388 -1.83697e-16 0.92388 0.707107 -0.382683 -1 
1.22465e-16 4.68652e-17 -8.65956e-17 0 0 0 8.65956e-17 -4.68652e-17 -1.22465e-16 
-1 -0.382683 0.707107 0 0 0 -0.707107 0.382683 1 
-2.44929e-16 -9.37304e-17 1.73191e-16 0 0 0 -1.73191e-16 9.37304e-17 2.44929e-16 
1 0.382683 -0.707107 -0.92388 -1.83697e-16 0.92388 0.707107 -0.382683 -1 
3.67394e-16 1.40596e-16 -2.59787e-16 -3.39428e-16 -6.74892e-32 3.39428e-16 2.59787e-16 -1.40596e-16 -3.67394e-16 
-1 -0.382683 0.707107 0.92388 1.83697e-16 -0.92388 -0.707107 0.382683 1 
-4.89859e-16 -1.87461e-16 3.46382e-16 4.5257e-16 8.99856e-32 -4.5257e-16 -3.46382e-16 1.87461e-16 4.89859e-16 
];
err = [
0 1.7265e-16 1.51589e-15 -8.64258e-16 2.80837e-15 -2.16001e-15 -3.01691e-15 -1.45024e-14 0 
-5.55112e-16 -0.0145144 -0.229296 -0.296797 5.67355e-16 0.296797 0.229296 0.0145144 0 
-5.89562e-15 -0.066286 -0.166985 0 0 0 0.166985 0.066286 0 
3.44169e-15 -0.083645 0.0121009 0 0 0 -0.0121009 0.083645 0 
7.4453e-16 -0.0428707 -0.0850588 0 0 0 0.0850588 0.0428707 0 
-7.88258e-15 -0.00277894 -0.193127 -0.225198 -2.86648e-15 0.225198 0.193127 0.00277894 0 
1.85305e-15 -0.0126429 -0.0205829 -0.0178906 -3.61508e-15 0.0178906 0.0205829 0.0126429 0 
2.77556e-15 -0.0272097 0.141328 0.174218 -3.96886e-15 -0.174218 -0.141328 0.0272097 0 
0 0 7.64722e-15 -4.25737e-14 2.16885e-15 1.76914e-15 3.12747e-15 0 0 
];
